The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 20, 1976
Filed:
Mar. 04, 1974
Sergio De Feudis, Nacka, SW;
Aktiebolaget Svenska Flaktfabriken, Nacka, SW;
Abstract
In pneumatic refuse systems, each vertical branch duct for receiving the refuse is normally connected to a main suction duct through a valve which, when closed, causes the refuse to be collected in the bottom of the branch duct and, when periodically opened, releases the accumulated refuse into the main duct. Liquid in the accumulated refuse also accumulates, undesirably, on the upper side of the valve. The invention provides an annular chamber positioned around the botttom of the branch duct, and circumferentially spaced-apart openings from the annular chamber to the interior of the branch duct at the level of the top of the valve, so that liquid accumulating at the bottom of the branch duct is collected in the annular chamber; a small bypass duct extends from the annular chamber to the adjacent main duct, so that the collected liquid is sucked out of the annular chamber and into the main duct, thereby clearing the valve of liquid.